Method for detecting oil on tobacco products and packaging

ABSTRACT

A process for detecting oil or lubricant contamination in a manufactured product, the process comprising adding at least two fluorescent taggants to oils or lubricants contained in processing machinery for said product, irradiating said product, causing at least one of said taggants to fluoresce and detecting radiation emitted by said fluorescing taggant in an oil-contaminated product.

CROSS REFERENCE TO RELATED APPLICATION(S)

This application is a continuation application of U.S. application Ser. No. 14/938,561, filed Nov. 11, 2015, which claims priority to U.S. Provisional Application No. 62/078,290, filed Nov. 11, 2014, the entire contents of each of which are incorporated herein by reference.

FIELD

Disclosed herein is an inspection process for detection of oil and/or grease (lubricants) contamination on tobacco, tobacco products, food, pharmaceuticals, packaging, and other consumer goods and products.

ENVIRONMENT

In the processing and packaging of consumer products and products designed to provide tobacco enjoyment, oils, greases and other such lubricants may inadvertently come into contact with the product being produced.

In the case of products designed to provide tobacco enjoyment, tobacco leaf is processed prior to the time that it is provided as final product. For example, leaf may be contacted by machinery during harvesting, curing and transport to a stemmery. When leaf is provided in strip form at a stemmery, and cut or otherwise shredded to the desired size, it is possible for oils, greases and lubricants to inadvertently come into contact with the tobacco. Likewise, lubricants used in operating the various machines used in the processing of the tobacco can inadvertently come into contact with that tobacco. The sources of lubricant contamination can vary, such as when a particular piece of machinery or component of that piece of machinery fails to operate in an optimum fashion. Additionally, lubricants may inadvertently come into contact with tobacco due to leakage of lubricants through gaskets or seals, from sliding mechanisms, from drum systems, from gear boxes, from pumps, from sealed rolling bearing units, from chains and belts, and the like. Lubricants are used in conditioning cylinders, threshers, separators, redryers, receivers, feeders, conveyors, cutters, blenders, tobacco presses and other such pieces of equipment that are commonly used in tobacco stemmeries, and in tobacco primary processing operations.

Lubricants of similar compositions are used throughout the various stages of tobacco treatment and cigarette manufacture. Heretofore, it has been difficult for the cigarette manufacturer to detect the presence of oil in its tobacco and/or its cigarettes and to locate the source of a particular lubricant once it has been detected. For example, conventional detection is by visual observation of a spot on a wrapped tobacco rod, followed by removal of the contaminated object and laboratory analysis, which is a time consuming process.

It would be advantageous if the inspection of machine-processed products, such as tobacco and tobacco products, for the presence of a lubricant or the like could be facilitated.

SUMMARY

In one aspect, disclosed is a process for detecting oil or lubricant contamination in a manufactured product, the process comprising adding at least two fluorescent taggants to oils or lubricants contained in processing machinery for said product, irradiating said product, causing at least one of said taggants to fluoresce, and detecting radiation emitted by said fluorescing taggant in an oil-contaminated product.

In one form, at least one of said fluorescent taggants fluoresces upon irradiation with ultraviolet radiation.

In one form, the at least one fluorescent taggant emits radiation in the visible spectrum.

In one form, both of said fluorescent taggants fluoresce upon irradiation with ultraviolet radiation.

In one form, the fluorescent taggants are added to said oils or lubricants at different concentration levels, with at least one taggant being added at a sufficient concentration level for its emission to be visually detectable by an operator of said process.

In one form, at least one fluorescent taggant is added to said oils or lubricants at a concentration of between about 50 ppb and about 100 ppm.

In one form, the process further comprises conveying said product past an electronic radiation detection apparatus which detects radiation emitted by said fluorescing taggant.

In one form, the fluorescent taggants are Stokes-shifting taggants, which absorb radiation at a first wavelength and fluoresce at a second wavelength, different from said first wavelength.

In one form, the product is a cigarette rod which is wrapped in paper.

In one form, the product is a food product.

In one form, one or both of the fluorescent taggants is oil soluble.

In one form, one or both of the fluorescent taggants is oil dispersible.

In another aspect, disclosed is a process for detecting oil or lubricant contamination in a tobacco product, the process comprising adding at least two fluorescent taggants to oils or lubricants contained in processing machinery for said product, irradiating said product, causing at least one of said taggants to fluoresce, and detecting radiation emitted by said fluorescing taggant in an oil-contaminated product.

In one form, at least one of said fluorescent taggants fluoresces upon irradiation with ultraviolet radiation.

In one form, the at least one fluorescent taggant emits radiation in the visible spectrum.

In one form, both of said fluorescent taggants fluoresce upon irradiation with ultraviolet radiation.

In one form, the fluorescent taggants are added to said oils or lubricants at different concentration levels, with at least one taggant being added at a sufficient concentration level for its emission to be visually detectable by an operator of said process.

In one form, at least one fluorescent taggant is added to said oils or lubricants at a concentration of between about 50 ppb and about 100 ppm.

In one form, the process further comprises conveying said product past an electronic radiation detection apparatus which detects radiation emitted by said fluorescing taggant.

In one form, the fluorescent taggants are Stokes-shifting taggants, which absorb radiation at a first wavelength and fluoresce at a second wavelength, different from said first wavelength.

In one form, the product is a cigarette rod which is wrapped in paper.

In one form, the product is a food product.

In one form, one or both of the fluorescent taggants is oil soluble.

In one form, one or both of the fluorescent taggants is oil dispersible.

In yet another aspect, disclosed is a process for identifying the source of oil contamination of products produced in a manufacturing process having multiple machines in series, each containing one or more oils or lubricants, comprising adding a first fluorescent taggant to all of the oils or lubricants of each machine in the series, adding a second fluorescent taggant to each oil or lubricant of each machine in the series, different from said first fluorescent taggant and unique to each oil or lubricant of each machine in the series, irradiating the product with a first radiation spectrum and detecting radiation emitted by the first fluorescent taggant and removing the radiation emitting product from the process.

In one form, the process further comprises irradiating the removed product with a second radiation spectrum and detecting radiation emitted by said second fluorescent taggant, so as to identify the source of said contamination.

In one form, detection of radiation emitted by said second fluorescent taggant is conducted with an electronic radiation detection apparatus.

In one form, detection of radiation emitted by the first fluorescent taggant is conducted visually by an operator of said process.

In one form, the first fluorescent taggant is added to said oils or lubricants at a sufficient concentration level for its emission to be visually detectable by an operator of said process.

In one form, said fluorescent taggants are Stokes-shifting taggants, which absorb radiation at a first wavelength and fluoresce at a second wavelength, different from said first wavelength.

In one form, at least said first fluorescent taggant absorbs radiation in the ultraviolet spectrum and emits radiation in the visible spectrum.

In one form, the machines include one for preparing a raw material for shipping.

In one form, the machines include a packaging machine.

In one form, detection of radiation emitted by said first fluorescent taggant is conducted with an electronic radiation detection apparatus mounted on or within at least one of said multiple machines in said series.

In one form, detection of radiation emitted by said first fluorescent taggant is conducted visually by an operator of the process, and detection of radiation emitted by said second fluorescent taggant is conducted with an electronic radiation detection apparatus.

In one form, detection of radiation emitted by said first fluorescent taggant is conducted with an electronic radiation detection apparatus mounted on or within at least one of said multiple machines in said series, and detection of radiation emitted by said second fluorescent taggant is conducted with an electronic radiation detection apparatus located separately from said first electronic radiation detection apparatus.

BRIEF DESCRIPTION OF THE DRAWINGS

The forms disclosed herein are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar elements and in which:

The FIGURE presents a diagrammatic illustration of one sequence of the process of the invention.

DETAILED DESCRIPTION

Various aspects will now be described with reference to specific forms selected for purposes of illustration. It will be appreciated that the spirit and scope of the apparatus, system and methods disclosed herein are not limited to the selected forms.

Each of the following terms written in singular grammatical form: “a,” “an,” and “the,” as used herein, may also refer to, and encompass, a plurality of the stated entity or object, unless otherwise specifically defined or stated herein, or, unless the context clearly dictates otherwise. For example, the phrases “a device,” “an assembly,” “a mechanism,” “a component,” and “an element,” as used herein, may also refer to, and encompass, a plurality of devices, a plurality of assemblies, a plurality of mechanisms, a plurality of components, and a plurality of elements, respectively.

Each of the following terms: “includes,” “including,” “has,” “having,” “comprises,” and “comprising,” and, their linguistic or grammatical variants, derivatives, and/or conjugates, as used herein, means “including, but not limited to.”

Throughout the illustrative description, the examples, and the appended claims, a numerical value of a parameter, feature, object, or dimension, may be stated or described in terms of a numerical range format. It is to be fully understood that the stated numerical range format is provided for illustrating implementation of the forms disclosed herein, and is not to be understood or construed as inflexibly limiting the scope of the forms disclosed herein.

Moreover, for stating or describing a numerical range, the phrase “in a range of between about a first numerical value and about a second numerical value,” is considered equivalent to, and means the same as, the phrase “in a range of from about a first numerical value to about a second numerical value,” and, thus, the two equivalently meaning phrases may be used interchangeably.

It is to be understood that the various forms disclosed herein are not limited in their application to the details of the order or sequence, and number, of steps or procedures, and sub-steps or sub-procedures, of operation or implementation of forms of the method or to the details of type, composition, construction, arrangement, order and number of the system, system sub-units, devices, assemblies, sub-assemblies, mechanisms, structures, components, elements, and configurations, and, peripheral equipment, utilities, accessories, and materials of forms of the system, set forth in the following illustrative description, accompanying drawings, and examples, unless otherwise specifically stated herein. The apparatus, systems and methods disclosed herein can be practiced or implemented according to various other alternative forms and in various other alternative ways.

It is also to be understood that all technical and scientific words, terms, and/or phrases, used herein throughout the present disclosure have either the identical or similar meaning as commonly understood by one of ordinary skill in the art, unless otherwise specifically defined or stated herein. Phraseology, terminology, and, notation, employed herein throughout the present disclosure are for the purpose of description and should not be regarded as limiting.

Disclosed herein is a method of detecting oil and/or grease found on tobacco products and/or packaging through the use of taggants. In this method a taggant is added to oil/grease, such as that in a piece of manufacturing equipment or involved in a manufacturing process, that may come into contact with the tobacco product and/or packaging. If the taggant is then detected, the product is removed as it is contaminated. Additionally, a second taggant can be added to oil as a “discriminating taggant”, which is unique for a particular machine or area of the process. Once oil is detected using the primary taggant, the oil spot can be further interrogated by an offline instrument to determine the source of the “discriminating taggant” and further aid personnel in pinpointing the course of the manufacturing challenge.

In one form, the detection system disclosed herein can be used in many processes and for consumer products which are susceptible to lubricant contamination during the manufacturing process, such as for example in the growing, collection, processing and/or packaging of packaged consumer goods, such as food products, beverages, tipped and non-tipped cigars, cigarillos, snus and other smokeless tobacco products, smoking articles, electronic cigarettes, distilled products, pharmaceuticals, frozen foods and other comestibles, and the like. Further applications could include clothing, furniture, lumber or any other manufactured or packaged product wherein an absence of oil is desired.

In one embodiment, the process comprises adding at least two fluorescent taggants to oils or lubricants contained in processing machinery for said product, such as a tobacco product, irradiating said product, causing at least one of said taggants to fluoresce, and detecting radiation emitted by said fluorescing taggant in an oil-contaminated product. Advantageously, at least one of said fluorescent taggants fluoresces upon irradiation with ultraviolet radiation, and emits radiation in the visible spectrum, so as to be easily detected by an observer.

In a more preferred embodiment, both of said fluorescent taggants fluoresce upon irradiation with ultraviolet radiation, at least the first of which emits radiation in the visible spectrum. Preferably, the fluorescent taggants are Stokes-shifting taggants, which absorb radiation at a first wavelength and fluoresce at a second wavelength, different from said first wavelength.

According to the process of the present invention, the product can be conveyed past an electronic radiation detection apparatus which detects radiation emitted by said fluorescing taggant(s). The product can be a tobacco product, such as a cigarette rod wrapped in paper, or a food product.

Suitable fluorescent taggants include those which are oil soluble and those which are oil dispersible. Preferred taggant compounds fluoresce at specific wavelengths from about 390 nm to about 700 nm. More preferred taggant compounds fluoresce at specific wavelengths from about 425 nm to about 625 nm. For example, after irradiation with UV light, a taggant compound may fluoresce at a wavelength of 465 nm, 510 nm or 530 nm. In another embodiment, the taggant compound is a UV sensitive compound (emits visible light in response to UV radiation). In many instances, since the machine-processed product may be subject to handling or ingestion by consumers, it is advantageous to utilize organic taggants, especially those which demonstrate little or no toxicity.

Examples of organic taggant compounds include pyrazolines, oxinates, benzoxazinones, benzimidazoles, benzthiazoles, thioxanthenes, anthranilic acids, terephthalic acids, aldazines, coumarines, barbituric acids, lumiphores, oxazoles, thiazoles, cumene, stilbenes, and derivatives thereof, such as phytochrome, riboflavin, aryl-acetylenes, 2,5-diaryl-oxazoles, 1,2,3-oxadiazoles, aryl-substituted 2-pyrazolidines, xanthones, thioxanthones and acridones, benzazoles, benzotriazoles, benzoquinolines, fluoresceine derivatives, derivatives of phenothiazine, phenoxazine, quinine derivatives (including quinine derivatives having fused aromatic rings), coumarins, indigo derivatives, derivatives of naphthalic anhydride and naphthalimide, perilenes and the like.

The fluorescent taggants can be added to said oils or lubricants at different concentration levels, with at least one taggant being added at a sufficient concentration level for its emission to be visually detectable by an operator of said process. Accordingly, at least one fluorescent taggant is added to said oils or lubricants at a concentration of between about 50 ppb and 100 about ppm, or between about 10 ppm and 100 about ppm.

However, in order to provide for easier treatment of oils or lubricants already in place within various machines, it can be more convenient to formulate a master batch of at least the first taggant in any particular oil, wherein the taggant is mixed at higher concentrations in the base oil/lubricant, such as from about 0.1 to about 5 wt % taggant, or even from about 0.2 to about 2 wt % taggant, in a balance of the base oil/lubricant. A portion of such tagged master batch is then easily transported and added to oils/lubricants which are already in place in the machines to be treated, for example by adding a small amount of the tagged master batch to the oil sump of the machine. The second, discriminating taggants can be added either directly to the particular machine oil to be treated, or added to different portions of the tagged master batch, and then added to the appropriate machine.

When the taggant is not an oil-soluble taggant, an optional surfactant or dispersant additive can be added in an amount effective to facilitate dispersion of the taggant particles in the base oil. Such surfactants/dispersants are well-known in the art and their identities need not be repeated herein.

According to the present invention, a detectable taggant compound is added to the various lubricants used in manufacturing and processing machinery, and advantageously taggant compounds having different characteristics are added into the lubricants at different processing locations, such that detection of one or more of these taggant compounds can enable rapid identification of the location of the source of lubricant contamination in the manufactured product.

Thus, in another embodiment the invention is directed to a process for identifying the source of oil contamination of products produced in a manufacturing process having multiple machines in series, each containing one or more oils or lubricants, comprising adding a first fluorescent taggant to all of the oils or lubricants of each machine in the series, adding a second fluorescent taggant to each oil or lubricant of each machine in the series, different from said first fluorescent taggant and unique to each oil or lubricant of each machine in the series, irradiating the product with a first radiation spectrum and detecting radiation emitted by the first fluorescent taggant and removing the radiation emitting product from the process.

The process further comprises irradiating the removed product with a second radiation spectrum and detecting radiation emitted by said second fluorescent taggant, so as to identify the source of said contamination.

In one embodiment, detection of radiation emitted by said first fluorescent taggant is conducted visually by an operator of said process, and optionally detection of the second fluorescent taggant is conducted with an electronic radiation detection apparatus. Accordingly, the first fluorescent taggant is added to said oils or lubricants at a sufficient concentration level for its emission to be visually detectable by an operator of said process. Similarly to the above disclosure, the fluorescent taggants are Stokes-shifting taggants, which absorb radiation at a first wavelength and fluoresce at a second wavelength, different from said first wavelength, especially wherein at least the first fluorescent taggant absorbs radiation in the ultraviolet spectrum and emits radiation in the visible spectrum.

Conversely, in another embodiment detection of radiation emitted by said first fluorescent taggant is conducted with an electronic radiation detection apparatus mounted on or within at least one of multiple machines in said series.

Additionally, detection of radiation emitted by said first fluorescent taggant can be conducted visually by an operator of the process, and detection of radiation emitted by said second fluorescent taggant can be conducted with an electronic radiation detection apparatus.

Likewise, in another alternative the process can be conducted such that detection of radiation emitted by said first fluorescent taggant is conducted with an electronic radiation detection apparatus mounted on or within at least one of said multiple machines in said series, and detection of radiation emitted by said second fluorescent taggant can be conducted with an electronic radiation detection apparatus located separately from said first electronic radiation detection apparatus.

In the accompanying FIGURE, three processing machines, 10, 20 and 30 have a first fluorescent compound A added to the oil or lubricant of each machine. This first fluorescent compound A can be irradiated with such as ultraviolet radiation and fluoresces in the visible spectrum, such that its presence can be visually identified in a visual inspection station 40. Upon observation of contamination of the first fluorescent compound, the contaminated product is removed and sent to identification station 50. Each of machines 10, 20 and 30 also have differing second fluorescent compounds B, C and D added to the oil or lubricant of each machine. Each second fluorescent compound can be irradiated with such as ultraviolet radiation at the identification station 50, and each will produce an emission at differing wavelengths, which allows the inspector to identify from which machine 10, 20 or 30 the contamination has originated. Because under the teachings herein, an inexpensive ultraviolet light fixture or a hand-held ultraviolet light unit may be used as a source and because the common taggant “A” responds in the visible light spectrum (avoiding the need for expensive detectors), the teachings herein provide an inexpensive, yet effective way to check for the presence of oil on an on-line basis, with little or no impact on operations or safety.

The machines suitable for treating with the presently disclosed system and process include those for preparing a raw material for shipping, such as a packaging machine.

The embodiments disclosed herein, as illustratively described and exemplified hereinabove, have several beneficial and advantageous aspects, characteristics, and features. The embodiments disclosed herein successfully address and overcome shortcomings and limitations, and widen the scope, of currently known teachings with respect to the detection of oil and lubricants on tobacco products or packaging.

As used herein, the term “and/or” placed between a first entity and a second entity means one of (1) the first entity, (2) the second entity, and (3) the first entity and the second entity. Multiple entities listed with “and/or” should be construed in the same manner, i.e., “one or more” of the entities so conjoined. Other entities may optionally be present other than the entities specifically identified by the “and/or” clause, whether related or unrelated to those entities specifically identified. Thus, as a non-limiting example, a reference to “A and/or B,” when used in conjunction with open-ended language such as “comprising” may refer, in one embodiment, to A only (optionally including entities other than B); in another embodiment, to B only (optionally including entities other than A); in yet another embodiment, to both A and B (optionally including other entities). These entities may refer to elements, actions, structures, steps, operations, values, and the like.

As used herein, the phrase “at least one,” in reference to a list of one or more entities should be understood to mean at least one entity selected from any one or more of the entity in the list of entities, but not necessarily including at least one of each and every entity specifically listed within the list of entities and not excluding any combinations of entities in the list of entities. This definition also allows that entities may optionally be present other than the entities specifically identified within the list of entities to which the phrase “at least one” refers, whether related or unrelated to those entities specifically identified. Thus, as a non-limiting example, “at least one of A and B” (or, equivalently, “at least one of A or B,” or, equivalently “at least one of A and/or B”) may refer, in one embodiment, to at least one, optionally including more than one, A, with no B present (and optionally including entities other than B); in another embodiment, to at least one, optionally including more than one, B, with no A present (and optionally including entities other than A); in yet another embodiment, to at least one, optionally including more than one, A, and at least one, optionally including more than one, B (and optionally including other entities). In other words, the phrases “at least one,” “one or more,” and “and/or” are open-ended expressions that are both conjunctive and disjunctive in operation. For example, each of the expressions “at least one of A, B and C,” “at least one of A, B, or C,” “one or more of A, B, and C,” “one or more of A, B, or C” and “A, B, and/or C” may mean A alone, B alone, C alone, A and B together, A and C together, B and C together, A, B and C together, and optionally any of the above in combination with at least one other entity.

In the event that any patents, patent applications, or other references are incorporated by reference herein and define a term in a manner or are otherwise inconsistent with either the non-incorporated portion of the present disclosure or with any of the other incorporated references, the non-incorporated portion of the present disclosure shall control, and the term or incorporated disclosure therein shall only control with respect to the reference in which the term is defined and/or the incorporated disclosure was originally present.

As used herein the terms “adapted” and “configured” mean that the element, component, or other subject matter is designed and/or intended to perform a given function. Thus, the use of the terms “adapted” and “configured” should not be construed to mean that a given element, component, or other subject matter is simply “capable of” performing a given function but that the element, component, and/or other subject matter is specifically selected, created, implemented, utilized, programmed, and/or designed for the purpose of performing the function. It is also within the scope of the present disclosure that elements, components, and/or other recited subject matter that is recited as being adapted to perform a particular function may additionally or alternatively be described as being configured to perform that function, and vice versa.

Illustrative, non-exclusive examples of apparatus and methods according to the present disclosure are presented in the following enumerated paragraphs. It is within the scope of the present disclosure that an individual step of a method recited herein, including in the following enumerated paragraphs, may additionally or alternatively be referred to as a “step for” performing the recited action.

PCT1. A process for detecting oil or lubricant contamination in a manufactured product, the process comprising: adding at least two fluorescent taggants to oils or lubricants contained in processing machinery for said product; irradiating said product, causing at least one of said taggants to fluoresce; and detecting radiation emitted by said fluorescing taggant in an oil-contaminated product.

PCT2. The process of paragraph PCT1, wherein at least one of said fluorescent taggants fluoresces upon irradiation with ultraviolet radiation.

PCT3. The process of paragraph PCT2, wherein said at least one fluorescent taggant emits radiation in the visible spectrum.

PCT4. The process of any preceding paragraph, wherein both of said fluorescent taggants fluoresce upon irradiation with ultraviolet radiation.

PCT5. The process of any preceding paragraph, wherein the fluorescent taggants are added to said oils or lubricants at different concentration levels, with at least one taggant being added at a sufficient concentration level for its emission to be visually detectable by an operator of said process.

PCT6. The process of any preceding paragraph, wherein at least one fluorescent taggant is added to said oils or lubricants at a concentration of between about 50 ppb and about 100 ppm.

PCT7. The process of any preceding paragraph, further comprising conveying said product past an electronic radiation detection apparatus which detects radiation emitted by said fluorescing taggant.

PCT8. The process of any preceding paragraph, wherein said fluorescent taggants are Stokes-shifting taggants, which absorb radiation at a first wavelength and fluoresce at a second wavelength, different from said first wavelength.

PCT9. The process of any preceding paragraph, wherein said product is a cigarette rod which is wrapped in paper.

PCT10. The process of any preceding paragraph, wherein said product is a food product.

PCT11. The process of any preceding paragraph, wherein one or both of the fluorescent taggants is oil soluble.

PCT12. The process of any preceding paragraph, wherein one or both of the fluorescent taggants is oil dispersible.

PCT13. A process for detecting oil or lubricant contamination in a tobacco product, the process comprising: adding at least two fluorescent taggants to oils or lubricants contained in processing machinery for said product; irradiating said product, causing at least one of said taggants to fluoresce; and detecting radiation emitted by said fluorescing taggant in an oil-contaminated product.

PCT14. A process for identifying the source of oil contamination of products produced in a manufacturing process having multiple machines in series, each containing one or more oils or lubricants, comprising: adding a first fluorescent taggant to all of the oils or lubricants of each machine in the series; adding a second fluorescent taggant to each oil or lubricant of each machine in the series, different from said first fluorescent taggant and unique to each oil or lubricant of each machine in the series; irradiating the product with a first radiation spectrum and detecting radiation emitted by the first fluorescent taggant; and removing the radiation emitting product from the process.

PCT15. The process of paragraph PCT14, further comprising irradiating the removed product with a second radiation spectrum and detecting radiation emitted by said second fluorescent taggant, so as to identify the source of said contamination.

PCT16. The process of paragraph PCT15, wherein detection of radiation emitted by said second fluorescent taggant is conducted with an electronic radiation detection apparatus.

PCT17. The process of any of paragraphs PCT14-PCT16, wherein detection of radiation emitted by the first fluorescent taggant is conducted visually by an operator of said process.

PCT18. The process of any of paragraphs PCT14-PCT17, wherein the first fluorescent taggant is added to said oils or lubricants at a sufficient concentration level for its emission to be visually detectable by an operator of said process.

PCT19. The process of any of paragraphs PCT14-PCT18, wherein said fluorescent taggants are Stokes-shifting taggants, which absorb radiation at a first wavelength and fluoresce at a second wavelength, different from said first wavelength.

PCT20. The process of paragraph PCT19, wherein at least said first fluorescent taggant absorbs radiation in the ultraviolet spectrum and emits radiation in the visible spectrum.

Industrial Applicability

The apparatus and methods disclosed herein are applicable to the consumer products industry.

It is believed that the disclosure set forth above encompasses multiple distinct inventions with independent utility. While each of these inventions has been disclosed in its preferred form, the specific embodiments thereof as disclosed and illustrated herein are not to be considered in a limiting sense as numerous variations are possible. The subject matter of the inventions includes all novel and non-obvious combinations and subcombinations of the various elements, features, functions and/or properties disclosed herein. Similarly, where the claims recite “a” or “a first” element or the equivalent thereof, such claims should be understood to include incorporation of one or more such elements, neither requiring nor excluding two or more such elements.

While the present invention has been described and illustrated by reference to particular forms, those of ordinary skill in the art will appreciate that the invention lends itself to variations not necessarily illustrated herein. For this reason, then, reference should be made solely to the appended claims for purposes of determining the true scope of the present invention. 

We claim:
 1. A process for detecting oil or lubricant contamination in a manufactured product, the process comprising: adding a first fluorescent taggant to a lubricant of a first processing machine and a lubricant of a second processing machine; adding a second fluorescent taggant to the lubricant of the first processing machine only; adding a third fluorescent taggant to the lubricant of the second processing machine only; irradiating the manufactured product; and detecting radiation emitted by the first fluorescent taggant, the second fluorescent taggant, the third fluorescent taggant, or any combination thereof in an oil-contaminated product.
 2. The process of claim 1, wherein the irradiating the manufactured product includes irradiating the product with a first radiation spectrum which would cause only the first fluorescent taggant to fluoresce.
 3. The process of claim 2, wherein the detecting comprises: visually detecting radiation emitted by the fluorescing first fluorescent taggant if present.
 4. The process of claim 2, wherein the irradiating comprises: irradiating the product with a second radiation spectrum which would cause only the second fluorescent taggant to fluoresce.
 5. The process of claim 4, wherein the detecting comprises: electronically detecting radiation emitted by the fluorescing second fluorescent taggant if present.
 6. The process of claim 4, wherein the irradiating comprises: irradiating the product with a third radiation spectrum which would cause only the third fluorescent taggant to fluoresce.
 7. The process of claim 6, wherein the detecting comprises: electronically detecting radiation emitted by the fluorescing third fluorescent taggant if present.
 8. The process of claim 1, wherein the first fluorescent taggant is different from the second fluorescent taggant and the third fluorescent taggant.
 9. The process of claim 8, wherein the second fluorescent taggant is different from the third fluorescent taggant.
 10. The process of claim 1, wherein the first fluorescent taggant, the second fluorescent taggant, and the third fluorescent taggant fluoresce upon irradiation with ultraviolet radiation.
 11. The process of claim 1, wherein the first fluorescent taggant, the second fluorescent taggant, and the third fluorescent taggant emit radiation in a visible spectrum.
 12. The process of claim 1, wherein the first fluorescent taggant and the second fluorescent taggant are each added to the lubricant of the respective first processing machine at a concentration of about 50 ppb to about 100 ppm.
 13. The process of claim 1, wherein the first fluorescent taggant is added to the lubricant of the first processing machine at a concentration of about 50 ppb to about 100 ppm.
 14. The process of claim 1, wherein the third fluorescent taggant is added to the lubricant of the second processing machine at a concentration of about 50 ppb to about 100 ppm.
 15. The process of claim 1, wherein the first fluorescent taggant, the second fluorescent taggant, and the third fluorescent taggant are Stokes-shifting taggants that absorb radiation at a first wavelength and fluoresce at a second wavelength, the second wavelength being different from the first wavelength.
 16. The process of claim 1, wherein the first fluorescent taggant, the second fluorescent taggant, and the third fluorescent taggant are oil soluble.
 17. The process of claim 1, wherein the first fluorescent taggant, the second fluorescent taggant, and the third fluorescent taggant are oil dispersible.
 18. The process of claim 1, wherein the first fluorescent taggant is added to the lubricant of the first processing machine and the lubricant of the second processing machine at a concentration of about 50 ppb to about 100 ppm, the second fluorescent taggant is added to the lubricant of the first processing machine at a concentration of less than about 50 ppb, and the third fluorescent taggant is added to the lubricant of the second processing machine at a concentration of less than about 50 ppb. 